共查询到19条相似文献，搜索用时 687 毫秒
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彩花油菜的创建及遗传育种进展 总被引：2，自引：0，他引：2
油菜既是重要的油料作物,也是极具观赏价值的大田作物,成片的油菜花每年吸引大量游客。近年来,随着农业旅游项目的不断研发,油菜花成为越来越重要的特色旅游资源,而且以黄色为主的菜花正在被白色、红色、紫色等彩色菜花所丰富,花色油菜种质的创制也被越来越多的育种家所突破。本文主要介绍了通过远缘杂交、原生质体融合、人工诱变、基因工程等方法获得的不同花色油菜新种质,概述了有关油菜花色的遗传机理、进化与选择等的研究进展,综述了彩花油菜育种的最新进展,并就未来发展趋势做了展望和建议。 相似文献
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甘蓝型油莱白花品系与黄花品系正反交F_1、F_2及BCF_1代花瓣颜色遗传表现,正反交F_1植株花色为乳白色,呈双亲中间型。F_2代分离出白、乳白和黄色三种花瓣色类型植株,白色和乳白色花植株数(311)与黄色花植株(117)数呈3:1分离。F_1与双亲回交后代分离出两种类型花色植株。与白花亲本回交后分离出白和乳白两种花色植株;与黄色亲本回交后,分离出乳白和黄花两种花色植株,且均呈1:1分离。表明,本文所应用的甘蓝型油菜白花性状对黄花呈不完全显性遗传。甘蓝型油菜的花瓣色受一对基因控制。 相似文献
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油菜抗倒伏性及其影响因素 总被引：1，自引：0，他引：1
倒伏是油菜高产栽培的主要障碍因子。油菜抗倒伏性研究一直是油菜及其栽培研究领域一个历久弥新的课题,其研究成果主要集中在以下几个方面：油菜倒伏的分级与诱因、油菜茎秆抗倒性的测定方法、油菜倒伏指数和倒伏系数的计算、油菜抗倒伏性与植株农艺性状关系研究。 相似文献
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多室油菜具有多室多粒的特性。本文概述了油菜的多室性状,从芥菜型、白菜型和甘蓝型多室油菜三个方面对近年来国内外多室油菜的形态和遗传研究进行了综述,对多室油菜研究中存在心皮数目、多室性状的嵌合性和起源进化等问题进行了讨论,并对多室油菜在高产、抗裂角性及果实发育研究中的应用前景进行了展望。油菜多室性状对丰富和充实油菜花器和角果的形态建成理论以及探讨其分子机制具有重要的理论意义;多室油菜的开发,也对丰富和充实油菜种质资源以及油菜的高产育种具有重要的现实意义。 相似文献
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本文定义了油菜理想株型的内涵，强调油菜的多功能性和理想株型的功能特定性。油菜理想株型是实现油菜某种特定功能，有利于相关经济效益最大化所具备的植株形态。阐明了油菜单株株型和群体株型两个维度之间的关系。梳理了油菜株型研究的基本脉络，提出油菜理想株型研究的四个阶段：初级阶段、成熟阶段、数字化阶段和分子生物技术阶段。系统构建了油菜株型的指标体系，株型指标包括了根、茎、叶、分枝、花、角果以及冠层结构形态等。归纳并提出了形态测量法、经验总结法、试验统计法、数字模拟法、栽培调控法和遗传改良法的油菜株型研究方法划分，提出了光合效能原理，形态结构原理，源、库、流原理，作物生理原理的油菜株型研究基本原理分类。介绍了基于籽粒丰产、基于机械直播、基于菜用或饲用、基于观赏性的四种典型油菜理想株型特征和内涵。分析了油菜株型研究存在的不足，并对油菜理想株型的基本特征、建构策略和研究趋势进行了讨论和展望。 相似文献
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Computerized color separation system for printed fabrics by using backward-propagation neural network 总被引：1，自引：0，他引：1
Textile production must be coupled with hi-tech assistant system to save cost of labor, material, time. Therefore color quality control is one very important step in any textiles, however excellent the fabric material itself is, if it lacks good color, then it may still result in dull sale. Therefore, this paper proposes a printed fabrics computerized color separation system based on backward-propagation neural network, whose primary function is to separate rich color of printed fabrics pattern so as to reduce time-consuming manual color separation color matching of current players. What it adopted was RGB color space, expressed in red, green, and blue. Analyze color features of printed fabrics, use gene algorithm to find sub-image with same color distribution as original image of printed fabrics yet smaller area, for later color separation algorithm use. In terms of color separation algorithm, this paper relied on supervised backward-propagation neural network to conduct color separation of printed fabrics RGB sub-image, and utilized PANTONE® standard color ticket to do color matching, so as to realize accurate color separation. 相似文献
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In this paper, a novel method based on logical analysis is proposed to recognize the layout of color yarns of yarndyed fabric from the color pattern. The mathematic expressions of the color pattern and the layout of color yarns are introduced first, and then the fitness of the layout of color yarns to the color pattern is defined by the relation between them. The principle of the proposed recognition method begins with the assumption of the color of the first warp yarn in the color pattern. The whole algorithm procedure is then analyzed in detail with an actual sample color pattern. Experiments on some color patterns recognized from actual yarn-dyed fabrics, some color patterns simulated manually and some color patterns including error color information of floats prove that the method proposed in this paper is effective for detecting the layout of color yarns from the color pattern of yarn-dyed fabric and it has fault-tolerance ability in some degree. The research in the paper can be used to construct the whole recognition system of the parameters of yarn-dyed fabric. 相似文献
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Popularity of clothing with different kinds of faded color effects has been growing in recent years, leading to development of several technologies and techniques for imparting the vintage and old-fashion look. However, most color fading technologies and processes involve use of significant quantities of chemicals and water, raising concerns about environmental pollution, and other related problems. It is quite difficult to control the color fading effect on textile products. Plasma treatment has been used for color fading of cotton apparel quite successfully in the last few years. Air is used as the color fading agent and therefore no chemical effluents are generated. This study examines color fading of sulfur dyed cotton fabrics with plasma treatment. Cotton fabrics (yellow color) dyed with sulfur dyes were plasma treated under varying conditions and the resultant color fading effect was evaluated instrumentally. The color fading effect was found to be quite controllable if the treatment parameters were properly selected. Besides, evenness of the end product was excellent. 相似文献
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We can only use color numbers, color values and design to describe the color pattern of printed fabrics, which is different
from woven fabrics with yarn disposition and texture as pattern determinants. Since most printed fabrics contain many different
patterns nowadays, we need more than words and simple methods to describe the color patterns. The complication in pattern
identification has made the analysis and comparison difficult and will have to be conducted manually. The automatic computer
color separating system for printed fabrics proposed in this paper uses unsupervised learning network to automatically separate
printed colors. The system first uses color scanner to pick the image of the printed fabrics and stores it as digital image.
Then, it uses wavelet transformation to minify the fabric image to reduce the calculation load of color separation and also
reserve the printing structure and color distribution of the original image. It also uses LAB color model to acquire characteristic
value of the colors and the Self-Organizing Map Network (SOMN) to conduct color separation. According to our experimental
results, this system can rapidly and automatically complete color separation and identify repeating patterns for printed fabrics’
images. 相似文献
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According to the color yarns in the fabric, the yarn-dyed fabrics are divided into two categories: single-systemmélange color
fabrics and double-system-mélange color fabrics. The method for inspecting the density of double-systemmélange color fabrics
is discussed in this study. By analyzing the pattern and color characters of double-system-mélange color fabrics, color-gradient
image is proposed to detect the density. The gray-projection method and correlation coefficient method are selected to locate
the wefts and warps. With the help of Fourier low-pass filter, the positions of yarns in double-system-mélange color fabric
are found, and then the density can be obtained by counting the yarns in a unit length automatically. The experiment proved
that the method proposed can detect double-system-mélange color fabric density successfully. 相似文献
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利用计算机读取整茶色泽参数的方法研究 总被引：2，自引：1，他引：1
建立了一种用计算机读取整茶色泽参数的方法——L处理法,并验证了其可靠性和对该方法进行了研究。结果表明,L处理法可以准确快速地读取整茶图象的色泽参数。扫描分辨率为100βdpi时,扫描图像的色泽参数95%置信区间分别为：L=0,-0.45≤a≤0.45,-0.71≤b≤0.71;当整茶扫描区域达到11βcm×11βcm或以上时,扫描图片的色泽参数可以代表茶样的实际色泽状况,其标准误(SE)分别为：-0.16≤L≤0.16,-0.13≤a≤0.13,b=0;整茶色泽参数与粉碎茶色泽参数存在显著差别,粉碎茶不能代表茶叶真实的外观色泽;电脑读取色泽参数的稳定性优于色差计。 相似文献
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P. M. Tomasula M. F. Kozempel M. J. Kurantz J. C. Craig 《American Journal of Potato Research》1992,69(9):525-536
Computer control of color development of potatoes through regulation of glucose/reducing sugar content in the blancher is demonstrated for french fry production. Color was controlled using two methods. In the first, anticipatory-feedback control was used to adjust glucose concentration in the potatoes leaving a hot-water blancher. Because the relationship between concentration and color was not defined through the mathematical model, operator intervention was required to control color. In the second, anticipatory-feedback control was combined with some simple rules for adjusting setpoints and color. Results indicate that the second scheme is preferable because it eliminates operator intervention to effect color control. 相似文献
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The influence of surface texture on the perceived color by a flatbed scanner is investigated. Knitted fabrics with 8 different
textures in variety of colors are prepared and used in scanning trial along with standard chart, i.e. IT8.7/2 from Kodak.
According to the results, the scanner detects different RGB values for different textures which are weaved from same colored
yarns. The means of R, G and B values are considered as a feature vector which shows the dominant color of each sample. Samples
are scanned with different resolutions and it is found that scanning resolution does not change the extracted color feature
vector. The IT8.7/2 standard target which benefits from non textural solid surface and fabrics with specific surface texture
are used for colorimetric characterization of scanner and the capability of scanner for estimation of color coordinates of
samples with different textures is examined. It is found that the characterization of scanner with textured target improves
the scanner accuracy for the color of textured materials. It is shown that the texture of media has a great effect on the
characterization results and there is relatively good correlation between the structural differences of textures of fabrics
used in training and testing steps with the mean of testing color difference values. To achieve a better color reproduction
results for fabrics, scanner characterization should be performed for each set of fabrics with specific texture. In this case,
increasing the bit depth of captured image in the scanning process leads to decrease of the mean of color difference value
for training and testing packages. 相似文献
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茶树叶片精准测色装置构建及在稀有种质鉴别中的应用 总被引：1，自引：0，他引：1
采用扫描仪、测色器Color Pix和RGB颜色系统建立测色装置,并利用在线工具Color Hexa将色差指标值转换成CIELab颜色体系参数,对绿、黄、紫色系典型茶树种质进行环向和径向测色法比较分析。结果表明,径向测定法采用单叶多点重复取值与环向测定法中环位取值具有相近叶色表征作用。通过对120个不同叶色种质的径向多点位重复测定和环向中环位测定,2种方法的明度L*、色差指标值a*和b*显著正相关。但是,考虑到使用的简便性与分析效率,提出用环向中环位测定值定义叶色更为合适。对上述120个供试茶树种质的环向中环位叶色测定值构成的三维散点图进行分析,发现能够将紫红色种质与紫色系种质有效分离,更进一步证明该技术在特异叶色种质精准鉴别中具有实用价值。 相似文献